Molding machine



' July 6', '19.26.

. 71,591,013 R. B. BRowNE" l fMOLDING `MACHINE Filed July 1, 1925 4 Sheets-SheetA 2' DoNALD, INCORPORATED Theimprovedfmqidmgmahinefof 'theji vention is adapted'especiallyjfor use'in thel manufacture of large work, suchas doors,v

frames, risers, treads and numerous lother architectural machine Vand other castings. In connectionfwith'the moldiri'g machine patterns Aof wood, metal 'or other suitable-v material may beused. The" machine is of that type 'in which manually operatedmeans the horizontal draw plate and: patternl plate,

and motive fluid means,` as pneumatic pumps, Y, i are utilized kfor balancing and cushioning L the weight'of the `drawfplate `to facilitate. itslfman'ualV operation.- vMeans are Aalso uti-v lized for automatically relieving `the motive luid `or` air pressure, and in connection 'with the air;pressurejmechanism I also employ anaut'omatic safety flockV to prevent aceidentaldescentor fallingof the draw plate.

These 'andfother' meritorious features ofv the with they draw plate removed.

invention .will he morev specificallyv set forth in". theQfolloWingl specification and claims and are Jillustratedf in thefaccompanying' drawings. j' j y The accompanying drawings illustrate one complete example 'of :theV physical embodiment of the inventionwherein the parte are combinedand arranged; according toY one inode thus far devis/ed forthepractical application' of the rirrciples of ,the invention. lfigurelisza v lew partly in lside elevation and partlyv in y"section for convenience of Y illustration Of 9i machine ,embodying tfh9 l l "fencing and cushioning the movement ofthe invention-K13' -*Figure 2 1sad1agrammat1c view showlng the topjof a drawlplate5 and air linefc'onf insurea A igure is anenlarged detailfview showlingin4 's CQIlfthe rsafety deviceor air lock.VV

Figure f5 is av transverse vertical Sotional view ofthel machine showing 'the draw plate vievv Of l[the machine With relief valvedegvice forthe airline.' Y

- [Figuret 'isafseetional view; similarto.

nonnina meclivn. 5 1

"Application nleafriill 1, 1925.V f sefiaifnamera 7 t are 'employed for vertically reciprocatingtion 'o f 1the' machine inf horizontal' section,

a; transversevertical. sectional the /dra'w plate i ,leverlfl from dotted'pos'ition tofullline po-A Figure 9"1 is anfedg plate ofthe safety device.

Figura p1ate:n 1 f-Figure 114 is a 'face of the 'safetydevicel 1 view f aovriplefe,

niermann. Bownnforinnooiinirn, NEW YORK, AssiGNon.roiRIoIrEYgBRowNE a i f'casting .forming e@ awhwbewja 'the air '100kQIlSafetY-fdevi .Y ,Y 'V In carrying out the, 'invention a wrectan uvlar machine body .or frame vis1 preferaly .and 1 l() fp ositionedon the pp'er Vor top edge of 'the'ilanged rectangular frame.'V

" The horizontally; disposed jdILW 'plate v11 'which is boredat suitable] location toy freceivefb'oltsofgthe pattern'plate,V isf vertically f reciprocalole' 'within the` machine frame, fa nd '.65 usedeomprisingfsubstantial Ieast `ir0 I 1` Sides. l Q Y 1 and'Qand ends'3 'andilin which portholes fis fashioned with usualfopenings 12 spaced and arranged;v at f desiredfintervala and at its under side said plate' is providedV with af vertical 'flange f orf web 18 of lsubstantially frectangularfsha vofthe 'plate p'ef andf'iniset from the edge? The reciprocable draw plate I isllanually operated and is guided by mechanical 4u ie'ans and pneumatie'press'ureisemployed 4forbail- Y plate. The guide and balancing devices are 'l For. lll'lnuallybperating the. draw; Plate". 'a

one endl oft-he machine. i This leverisafixed on acentral', longitudinally disposed actuat- 4chine andpositioned between a pair oi parallelfoperatihg shafts 16 f and l1 7.

nested gears'. or pinins 18, 19 and20y ori the respective shafts, fand the throw of the .Y- Ghirie the aruba 0i, Shafts may be. in?

These three shafts lare f operatively Econ-A disposedf at the four corners Vof Vthe plateto Stable reciprocablejmovement ofthe '95 i Single leve/' 14j. is employed f Vand located at ingsha't l'flocated near the `base" of the mam0 creased, while in smaller or narrower machines the number of shafts maybe decreased. y

-Thefti'v'lo operating kshafts 116 :andl fare provided with setslo'f'crank airms'2land 122l Vand these varms are pvotally connected by links or pitmen 23, 24 and 25 tobearing* plates 26 which are boltedat the .underside Y of the draw plate for tran'smitt'ingthe rotary powerrof the .shafts to the reciprocatingV movement of the plate `as developed lby the .strokes of the lever 14.

` The 'three shaftsl are provided withadjiu-stablev end and intermediate journal 4.bearings, by means of whichv the .throw of the pitmenmay be regulated land the movement of the drawv plate varied for .accomodating fare fashioned with vertically .arranged bearing slots 219Y vfor the three shafts. `In each of .theslots 29 Yis arranged a bearing bushing 130 Y`-fora shaft, and the bushing fashioned with a rectangular bearing plate larranged in close proximity to the '.ma'chine plates. These bearing plates are each fashioned with an upper centrallug 32, anda 5pair ofspaced Alower lugs 33lthat yproject laterally from the plate. The end plates '3 and 4 and the "uiter-V mediate plate 2'7 ,of the machine are fash- `loned with' complementary Vlugs or flanges 35 above the vbearing yplates and also witha pair :of lugs `or flanges below these bearing plates. Adjusting bolts 37 are employedA in iheimachine-plate lugs to engage the upper and' loi-wery faces ofthe t-wo sets of bearingplate lugs, and it will be apparent that by turning'the bolts the several bea-ring plates may be adjusted .uniformly .and'with facility to true thethreeshafts and .bring them to the desired Yrelative" positions.-

mentofthe reciprocabley draw plate means arejemploy-,ed at theffour corners of the ma,-

ehine comprising ylso-acting Istationary ygui ded end'Y guides .movable "with 'the draw plate.

At each ,endr ofthe draw.. plateand on .opposite 'sidespf the flange" .or'web 13 are vbolted vertically disposed ,guidev plates 3,8 having f grooves or ways39, and'complementary, ad-

j ustable plates140 each having a vertical rib '41, co-act with the guides of the draw plate. 'lhe stationary plates 4Q areattached at the .inner sides ofV the twoside plates Il and 2 of the machine frame,l and they may be adustedfas bybolts 42 toY compensate'for wear as well '-,as' to' vary ,the frictional engagement of' thepairs of plates. By'this means vthe draw plate'm'ay'be accurately trued upto a Forguiding and insuring ars'table movestable kand guided movement-and maintained l 1 at all times in that condition;

The weight or the load ofthe reciprocable .draw :plate is acounterbalanced y:and its move` theV machine to supply a constant air pressure for the pumps and vibrators .(.notshowny In ,the drawings four air pumps 43'areindi- Y cated by their cylinders, one located at .eajch l.corner of .the machine and properly support- ".ed within the body or frame.V 'The .pumps lare fof the 'neciprocable type having. pistonsV (notfsliown) and a piston stem 44 or plunger f bar., which 'has a loose 'hearing at its upper end in aboss 45 cast integralwi'th `the flange or web l'of .the .draw plate.

j An .air line to supply air pressure tothe pumps includes the .main air supply pipe J ,416 which enters .the machine'at one side 'thereof and extends longitudinally therein near .the .base portion, clear of the *operating j parts of the machine.` Near'Lthe ends of the machine `branch pipes and '.48' areconneotedy withy -t-he main pipe; to .supplya normally constant pressure of air-Ito the cylin- .ders of the pumps below their -pistons,1and;a

relief valve, ,as indicated in .Figure y7 .as 47 is used,V in'fthe'air line 'for' adjusting the eseape =of an'l when required. Artwoway control valve49 is also located in the main pipe and provided with a regulating handle Y 5,0 andshaft 5l whichextends outside of the machine 'for ready access to the handle. Anadjustablerelief valve 52V islocated in the main pipe and may he manipulated vby means ofthe shafti. Y

llydottedj lines in Ffgure 2 twov ,pads T54 and 55., which indicate positions cl2-the vibrators, ,are shown, and .the vibrators (not shown) are pneiuna'ticallly actuated .by air pressurein the pipe line '56'V vvh'ich :is con!n .nected ,to a two-way valve 49 Yby a hose ,connection lindicated at 257.,".By turning [the crank 50 to proper position theV passage of air, is regulated to hose Y57 and y thence through pipe V56Qfor operating vthe vibrators.

"Whenthe -drawrplate is lowered, the crank 50 which controls the vibrators Aalso opens Vthe adjustable relief valve 52 yby means -of theV l-inlrv connection '58 between Ythe .shaftsl 5l andl ,53 to permit slight escape of the machine is in operation with thedraw Y plate inv elevated position, an automatic Ving of the lever v14`is eliminated. i ,f f ThisA air loclror safety device is normally "safety device becpmes operative-forflocking the'r plate iii-its elevated position to lprevent accidental descent with consequentV ldanger to person or em'ateria'l(Vv The 'plate l isjthus .preventedf'from falling should the pressure 'vbelowthe pistonfy be relieved accidentally, and danger to the operator-from theI swing inoperativewhile airzpresslire ris on but be- 'gcomesqoperative while the plate iselevated,

i VAwhen theair pressurefisjwithdrawn.

n Vnormal position as indicated in Figure (4.' A strike plate74 is bolted to the bracket at'vr (VA VFor this purposeone of thershafts as f17 isprovided withan arm 59 fixed vto swing Awith the oscillating shaft and this` arm: swings 'upwardly'. as the -draw `plate lis elep "vated. VAt its 'free'end'thearin has a rigid hollow-1 head 60 in which a slide -bolt 61 is carried, andk by vmeans of a spring 62coil'ed crossY pin 63 of the bolt and the Vcover plate 64 at the end of the hollow headythe bolt is pressed `to'v/"ardthea-left inV Figure 4V asin- 1 dicated. At a suitable location in theV path,v

ofmovement of therbolt at the end of its n upfstroke an air valve. device. is located.

This device is attached byran anglebracket 7 65 to a side plate as 1 Vof the machine and includes `a bronze casing 66 secured to the bracket and, provided with an interior pres- A Y lsure chamber 67, which chamber normally( Vreceives air pressure through pipe 68 from the air pipe46`;

A. metal cover plate 69vr and leather 'gasket 70 are interposed-between the casting of ther pressure chamber and the bracket, andl escape of air is preventedlfrom the vpressure chamberf by means lof a slidable .plunger 71 having its head 7 2 'located inthe chamber to close a bore '73 in the bracket, cover plate and gasket. Withl pressure in thechamberV 67 from the air line'the plunger is held in its side opposite tothe pressure chamber and a bushing 75 is plunger to slide in. y' v The strike plate is fashioned Wah a Cam `or bevel face 76 'located in. thev `path of movements of the springpressed, projected -.-bolt 61and as thebolt strikes this face andv rides upon it the bolt is retracted to position Y shown in Figure 4.,.,If asindicated vin Fig- Veo f movement.

ing the plate and shaft 17 against relative about-the'V bolt and interposed: ,between a safety fixed Vth'erein'ffor the Acally operated. vri

Under these conditions theV p draw plate is locked in elevat'ed'position" and. cannotl be moved,` until air pressure isY again restored :whereupon the plunger 71 win leica amende bea mi release mesma 17'tov`turn. i

The vdraufplate .511 lis vraised or Aelevated to" position of- Figure lbythev operator iwho` manipulates the lever 14 vand swings, 1t downwardly to yhorizontalposition1 (full lure 5.y *The flask (not shown) fisthen'placed in its proper pesition on top "of'the machine.

lfilled with sand, tamped and; rolled. v The` draw plate with its pattern attached is lowlowering ofthe draw plate by use "of` the manual,leven-'14.v Afterlthe vdraw plate isk moved from -thefmachinej! toits proper 'po-v sition andV thedrawV p'lateffisy again elevated and theoperation repeated. Y-

Thedraw plate is1he1dlinfits normal ele `i g'lines) from the dottedline' positionof Fig- 1 -ered from the mold by actuating thecran'l: 50 at theside ofthegmachine to-re'leaseav small quantityioffairffrom the pumpsthus'- ,reducing the pressure Atherein-to'permit easy Y 30 i llowered the 'iask vwith the; mold, are re vated *position andi preventedffrom 'falling l yby action of gravity, by the use of the safety device or air lock, in the event that the air is accidentally turned 0E, or by a breakin theair line. Such an accident Vwould per suic'ientforce as to V'injure anyone in its `mit the draw plate to drop and in so doing 7. l -r y the lever 14 Would be swung upwardly with .9:5

path.A When the'draw plate is lowered the Q 1 arm 59 with `its plunger 6.1 swings away from the strike plate andthe plunger is -f thenrprojectedby the actionoffthespring 62.v When'the. draw plate is elevated, ou the return movement of the arm, the projected plunger contacts with'ka'nd'- rides over the cam face 6 of the 'strike'fpl'ata and this frictional contact ofthe Y plunger with 'the cam face forces the plungerback into 'its retracted position in the vhousing 60.; The.

plunger is thus againy in position to `be projected bysspring pressure whenrthe air pres'- sure is released in thechamberp' ,r and the lock 'iis 'mechanically and 'automati-` arious accessories have been .omittedv 4 Y from; the illustrations of the machine las', not c essential to 'theAT exemplificationYV of the f -presentinventionbut it"wil1beunderstood il? i y of course that these accessories .will be used"v invention.r

Having thus fully tion, AVwhat I claim as new and Adesire 'te secure by Letters Patent ,isi 1. The combination with a draw plate andactuating means therefor, ofy motive fluid Vactuated counterbalancing means Vfor said plate, va normallyv inoperative mechanical lock for` saldplate, and ai fluid pressure actuated device whereby the: platev is lockedy described my invenin the machinesconstructedfaccording to the l I when .pressure is. withdrawn from said de'- i f vice.

2. v'lhecombination with a draw plate and Arotary mechanism for locking said plate when pressure is Withdrawn from said de vice. 's if I .The combination With a draw plate and manually operated means for reciprocating said plate, of a plurality of motive fluid pumps and connections 'from' said pumps vfor counterbalancing the weight of the draw platev in its movements.

5. The combi-nationwvitha machine frame having stationary guidemembers, of a draw plate having 4rcofactingguide members, manually operated means for reciprocatingsaid plate, a plurality of motive fluidas, pumps,

and connections from said pumps,l for coun- Y terbalancing the weight ofthe draw plate.

6,.. The combination With a reciprocable draw v plate, of a plurality of operating shafts andineans for rocking saidl shafts,

means for transmitting the movement oit" the shafts to reciprocal movement of the plate, bearing-s for said shafts, and means-for adjusting said bea-rings, Y

7; rlhe combination .with a reciprocable draw plate, ef an actuating shaft and means for turning said shaft, a pair of operating shafts and gears connecting the three shatts, cranks ony sai-d shafts and pitmen connect ing saidv cranks and draw plate,bearings -for said. shafts, and mean-s tor. adjusting sai-d bear/ings.

RICHARD nnoWNn.. Y 

